摘要
分析了抗拉连接高强度螺栓的工作性能 ,指出高强度螺栓的抗拉承载力与很多因素如连接板翼缘和螺栓的刚性性质、撬力、预拉力等有关。当连接板翼缘的刚度较小时 ,其弯曲变形将造成明显的撬力 ,从而增大了螺栓力 ,使整个连接过早破坏。考虑到撬力的作用 ,各种设计方法被提出来。我国现行《钢结构设计规范》GB50 0 1 7中没有具体的撬力计算公式 ,只是在螺栓抗拉强度设计值公式中引入系数 0 .8来考虑撬力 ,设计应用较方便。但高强度螺栓抗拉承载力计算方法过于保守 ,其设计值明显低于国外标准 。
The tensile strength of high strength bolt is affected by many factors, including prying force. The prying force can result in the increment of bolt force, for which the connection failed ahead of time. Several methods are presented for calculating the prying force. In the China's 'Code for Design of Steel Structure' (GB50017), there is no formula for calculation of prying force and a factor of 0.8 is considered in formula for tensile strength of bolt for taking the prying force into account. It is proposed that the design value of tensile resistance for high strength bolt should be increased.
出处
《重庆建筑大学学报》
CSCD
2002年第4期25-30,共6页
Journal of Chongqing Jianzhu University